All photos by Jeffrey W. Mirick

Specs for images taken with a camera and lens:
Camera: Panasonic lumix DC-S5 Full Frame Camera - 26MB
Lens: 70-200 mm, F2.8 lens
Temperature: Room temperature
Star Tracking: The camera was mounted on the
Sky-Watcher Star Adventure to track the stars across the sky.
Mount: The Sky Watcher (and camera) was mounted on a camera mount capable of holding the weight of the Star tracker, camera, and lens.
Stacked images: 80 to 120 images were stacked to reduce the noise using PixInsight.
Specs for taking images using a telescope:
Telescope: Orion 190 mm (7.5 inches) F5.6 Maksutov-Newtonian (Mak-Newt) Astrogrraph Telescope
Mount: Orion Atlas II, EQ-G Computerized Goto Mount
Camera: Orion cooled CMOS 26 MB G26 camera Temperature: Camera was cooled to 0 C
Filter: SkyGlow Broadband Filter - Light pollution filter

Interacting and colliding galaxies - arp catalogue

Arp 55, Grasshopper Galaxy, UGC 4881
Distance: 527 Million Light Years
Magnitude: 15.6
Constellation: Lynx

Subframes: 37
Subframe exposure: 5 minutes
Total exposure:  3 hours and 5 minutes

Arp 65 - colliding galaxies
Distance: 335 million light years

Arp 94, NGC 3226 and NGC 3227
Distance: 50 Million Light Years

Name: Arp85, M51a (NGC 5194) and NGC 5195, Whirlpool galaxy
Distance: 23 Million Light Years
This is an image of 2 interacting galaxies.
NGC 5198 is also visible in the upper right corner at magnitude 13.2 - not connected to the other 2 galaxies.
Lens: 600 mm focal length, 92 mm diameter
Number of subframes: 51 images at 20 seconds, f/6.3
Total exposure: 1020 seconds, 17 minutes

Arp 116, M60 and NGC 4647 and other galaxies
Distance to M60: 57 Million Light Years

Arp 143, NGC 2444 and NGC 2445
Distance: 184 Million Light Years

Arp 148, Mayall's Object
Distance: 450 Million Light Years

Arp 271, NGC 5426, NGC 5427
Distance: 120 Millionn Light Years

The Stephan's Quinter
Distance: 210 to 340 Millionn Light Years

Arp 147 - colliding galaxies
Distance: 430 million light years

M84, Eyes Galaxies, Markarian's Chain, and other galaxies
Distance: 52-60 Million Light Years

Leo Galaxy Cluster of 3
The Leo Galaxies
M31, Andromeda Galaxy
M31, Andromeda Galaxy
M81 and M82: Camera, 200 mm lens
M81 and M82: Telescope
M51, Whirlpool Galaxy
Cluster of galaxies in Leo - M99 and M100